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Finding the Fourth Proportional to 223,752.38, 308,781.71 and 121,781.89

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Solution

The fourth proportional to 223,752.38, 308,781.71 and 121,781.89 is: 168,060.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,752.38 : 308,781.71 = 121,781.89 : x
  2. Step 2: Convert to fraction form
    223,752.38/308,781.71 = 121,781.89/x
  3. Step 3: Cross multiply
    223,752.38x = 308,781.71 × 121,781.89
  4. Step 4: Simplify right side
    223,752.38x = 37,604,019,773.73
  5. Step 5: Solve for x
    x = 37,604,019,773.73/223,752.38
  6. Step 6: Final answer
    x = 168,060.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.